and defense secretary leon panetta confirmed the u.s. has intelligence the syrian regime has moved some of its chemical weapons to better secure them. the death of six-day-old giant panda cub grabbed the attention of the public and scientists. we explore that online. hari sreenivasan has the details. >> sreenivasan: it took five years of trying to produce that baby panda. so, why is panda breeding so tricky? a scientist at the smithsonian explains the biological challenges facing this endangered species. jeffrey brown talks to pulitzer prize winner junot diaz about his new collection of stories, "this is how you lose her." and tonight's edition of "need to know" focuses on the battle for female voters in virginia. "women's choice" airs tonight on most pbs stations. find a link to "need to know" and much more on our web site, newshour.pbs.org. ray. >> suarez: and that's the newshour for tonight. monday is the first monday in october, so we'll preview the supreme court's new term. i'm ray suarez. >> woodruff: and i'm judy woodruff. "washin